Light-emitting devices with reflective elements

Abstract

A variety of light-emitting devices are disclosed that are configured to output light provided by a light-emitting element (LEE). In general, embodiments of the light-emitting devices feature two or more light-emitting elements, a scattering element that is spaced apart from the light-emitting elements, an extractor element coupled to the scattering element, and a reflective element that is configured and arranged to reflect light emitted from the light-emitting elements.

What is claimed is: 
     
       1. A light-emitting device, comprising:
 a base substrate; 
 a plurality of light-emitting elements (LEEs) disposed on the base substrate; 
 a plurality of first optical elements, each first optical element of the plurality of first optical elements having a first surface spaced apart from the plurality of LEEs, positioned to receive light from one or more of the plurality of LEEs, and configured to scatter light passing therethrough; 
 a plurality of second optical elements, each second optical element of the plurality of second optical elements having an exit surface, being transparent and optically coupled with a respective first optical element, and arranged to receive light therefrom; and 
 one or more reflective elements disposed between LEEs of the plurality of LEEs, the one or more reflective elements having reflective surfaces arranged to reflect portions of light emitted from the plurality of LEEs, and wherein the one or more reflective elements separate adjacent second optical elements. 
 
     
     
       2. The light-emitting device of  claim 1 , wherein each of the reflective elements has reflective surfaces opposing each other. 
     
     
       3. The light-emitting device of  claim 1 , wherein each of the reflective elements extends through exit surfaces of adjacent second optical elements. 
     
     
       4. The light-emitting device of  claim 1 , wherein the reflective elements extends from the second optical elements toward the base substrate. 
     
     
       5. The light-emitting device of  claim 1 , wherein the reflective surfaces of the reflective elements are arranged perpendicular to the base substrate. 
     
     
       6. The light-emitting device of  claim 1 , wherein the reflective surfaces of the reflective elements are planar. 
     
     
       7. The light-emitting device of  claim 1 , wherein power to one or more LEEs disposed on one side of one of the reflective elements and one or more LEEs disposed on opposing side of the one of the reflective elements is controlled independently. 
     
     
       8. The light-emitting device of  claim 1 , wherein power to each LEE of the plurality of LEEs is controlled separately. 
     
     
       9. The light-emitting device of  claim 1 , wherein each of the first optical elements is configured to isotropically scatter light passing therethrough. 
     
     
       10. The light-emitting device of  claim 1 , wherein each of the first optical elements comprises inelastic scattering centers. 
     
     
       11. The light-emitting device of  claim 1 , wherein each of the first optical elements comprises elastic scattering centers. 
     
     
       12. The light-emitting device of  claim 1 , wherein one or more of the LEEs disposed on one side of one of the reflective elements are configured to provide light having a first spectral power distribution, and one or more of the LEEs disposed on opposing side of the one of the reflective elements are configured to provide light having a second spectral power distribution different from the first spectral power distribution. 
     
     
       13. The light-emitting device of  claim 1 , wherein at least two of the LEEs disposed on one side of one of the reflective elements have different spectral power distributions and the at least two of the LEEs are independently controlled. 
     
     
       14. The light-emitting device of  claim 13 , wherein at least two of the LEEs disposed on opposing side of one of the reflective elements have different spectral power distributions and the at least two of the LEEs are independently controlled. 
     
     
       15. The light-emitting device of  claim 1 , wherein the base substrate has a reflective base surface facing the first optical elements. 
     
     
       16. The light-emitting device of  claim 15 , wherein the base surface is planar. 
     
     
       17. The light-emitting device of  claim 15 , wherein the base surface comprises specular reflective portions. 
     
     
       18. The light-emitting device of  claim 15 , wherein the base surface comprises diffuse reflective portions. 
     
     
       19. The light-emitting device of  claim 1 , wherein each of the first optical elements has a substantially uniform thickness. 
     
     
       20. The light-emitting device of  claim 1 , wherein the exit surface of each of the second optical elements is shaped such that an angle of incidence on the exit surface of the light provided by a corresponding first optical element that directly impinges on the exit surface is less than a critical angle for total internal reflection. 
     
     
       21. The light-emitting device of  claim 1 , wherein an axis of symmetry of the each first optical element and an axis of symmetry of a corresponding second optical element are collinear. 
     
     
       22. The light-emitting device of  claim 1 , wherein the exit surface of each of the second optical elements has a spherical shape. 
     
     
       23. The light-emitting device of  claim 1 , wherein a medium adjacent to the first surfaces is a gas.